scholarly journals Experimental Test of Heat Treatment Effect on Physical Properties of Red Oak (Quercus falcate Michx.) and Southern Pine (Pinus taeda L.)

Materials ◽  
2014 ◽  
Vol 7 (11) ◽  
pp. 7314-7323 ◽  
Author(s):  
Derya Korkut ◽  
Salim Hiziroglu
Keyword(s):  
Heat Treatment ◽  
Physical Properties ◽  
Pinus Taeda ◽  
Experimental Test ◽  
Treatment Effect ◽  
Red Oak ◽  
Southern Pine ◽  
Pinus Taeda L

scholarly journals Comparison of Aged and Fresh WholeTree as a Substrate Component for Production of Greenhouse-Grown Annuals

2011 ◽  
Vol 29 (1) ◽  
pp. 39-44
Author(s):  
Whitney G. Gaches ◽  
Glenn B. Fain ◽  
Donald J. Eakes ◽  
Charles H. Gilliam ◽  
Jeff L. Sibley
Keyword(s):  
Physical Properties ◽  
Pinus Taeda ◽  
Petunia Hybrida ◽  
Total Porosity ◽  
Dry Weight ◽  
Tagetes Patula ◽  
Entire Study ◽  
Pine Tree ◽  
Potential Benefits ◽  
Pinus Taeda L

Abstract WholeTree (WT) is a potential renewable greenhouse substrate component created by chipping and milling all aboveground portions of a pine tree (Pinus taeda L.). While research regarding the viability of WT as an alternative substrate component is widely available to growers, the potential benefits of aging WT remain unclear. The growth of Dreams White petunia (Petunia ×hybrida ‘Dreams White’) and Little Hero Yellow marigold (Tagetes patula ‘Little Hero Yellow’) in 1:1 (by vol) fresh WT:peat (FWTP) and 1:1 (by vol) aged WT:peat (AWTP), as well as physical properties of AWTP and FWTP were evaluated. For Experiment 1, AWTP had 17.6% particles greater than 3.2 mm as opposed to 12.4% for FWTP. In Experiment 2, this trend was reversed with 8.1% of AWTP particles greater than 3.2 mm and 20.4% for FWTP. For Experiment 1, AWTP had 90.5% total porosity (TP) as compared to 94.4% with FWTP. Air Space (AS) for AWTP was less than FWTP; AWTP had 10% more container capacity (CC) than FWTP. Bulk Density (BD) was similar in Experiment 1. There was no difference in TP in Experiment 2; however, all other physical properties followed a similar trend to Experiment 1. In both experiments marigolds grown in AWTP generally had a lower leachate pH and a higher EC than those grown in FWTP; a trend which was similar in petunia although differences were not present throughout the entire study. Marigolds grown in AWTP had 33% more blooms and 44% greater dry weight than those grown in FWTP, a trend similar in petunias. Aged WT in this study provided a more suitable substrate component for greenhouse grown marigolds and petunias than fresh WT.

Diffusion of sulfide into Southern pine (Pinus taeda L.) and sweetgum (Liquidambar styraciflua L.) particles and chips

Holzforschung ◽  
2006 ◽  
Vol 60 (5) ◽  
pp. 498-502 ◽  
Author(s):  
Aaron J. Jacobson ◽  
Gregory D. Smith ◽  
Rallming Yang ◽  
Sujit Banerjee
Keyword(s):  
Pinus Taeda ◽  
Liquidambar Styraciflua ◽  
Wood Structure ◽  
Southern Pine ◽  
White Liquor ◽  
Dilution Water ◽  
Pinus Taeda L ◽  
Reversible Phase ◽  
Reversible Component

Abstract Sulfide diffusion into wood has a rapid reversible component and a much slower irreversible component. During the initial reversible phase, sulfide is unable to diffuse into parts of the wood structure, probably because of charge exclusion. The diffusion of hydroxide and sulfide into saturated wood was imaged by immersing chips in white liquor, splitting them open and then imaging the hydroxide and sulfide profiles. Sulfide moves into the interior of the chip at a faster rate than hydroxide does because it is prevented from entering some of the pores and must move deeper into the chip to access dilution water.

INCIDENCE OF THE PINEWOOD NEMATODE1 IN A SOUTHERN PINE BEETLE2 INFESTATION IN CENTRAL LOUISIANA

1986 ◽  
Vol 21 (2) ◽  
pp. 114-117 ◽  
Author(s):  
D. N. Kinn
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Bursaphelenchus Xylophilus ◽  
Dendroctonus Frontalis ◽  
Southern Pine Beetle ◽  
Pinewood Nematode ◽  
Southern Pine ◽  
Pine Beetle ◽  
Pinewood Nematodes ◽  
Pinus Taeda L

A large infestation of southern pine beetle, (Dendroctonus frontalis Zimm.), located in central Louisiana, was surveyed for the pinewood nematode, Bursaphelenchus xylophilus (Steiner and Buhrer) Nickle. Pinewood nematodes were present in 4.2 percent of 94 loblolly pine (Pinus taeda L.) trees attacked by D. frontalis and were absent from 101 unattacked trees that surrounded the infestation. Monthly sampling of this infestation revealed an increase in the incidence of nematodes as the season progressed. Samples taken from different heights on beetle infested-boles did not differ significantly in the presence of nematodes.

scholarly journals Development of the Trametes versicolor (L.) C. G. Lloyd. fungus on the wood of thermoregulated Pinus taeda L.

2020 ◽  
Vol 19 (2) ◽  
pp. 112-116
Author(s):  
Luana Maria dos Santos ◽  
Erick Martins Nieri ◽  
Flávia Alves Pereira ◽  
Sandra Mara Krefta ◽  
Jéssica Batista da Mata
Keyword(s):  
Heat Treatment ◽  
Pinus Taeda ◽  
Trametes Versicolor ◽  
Treated Wood ◽  
White Rot ◽  
White Rot Fungus ◽  
Planted Forests ◽  
Heat Treated ◽  
Loss Of Mass ◽  
Pinus Taeda L

The companies in the forestry sector seek highly durable wood, prioritizing the use of planted forests, and the thermal treatment is a viable alternative to provide quality to these woods. Thus, the objective of the study was to evaluate the resistance of the heat-treated Pinus taeda L wood by the attack of white rot fungus Trametes versicolor (L.) CG Lloyd. The P. taeda L. wood was deployed in joinery to obtain samples with dimensions of 30 x 15 x 2.5 cm (length x width x thickness), being treated at temperatures of 140, 160 and 180ºC. From these, 1.0 x 1.0 x 1.0 cm specimens were obtained and subjected to the fungus for six weeks. The accelerated rot test was carried out in accordance with the ASTM D2017 standard. The experiment was conducted in a completely randomized design with four treatments (T1 = 0; T2 = 140°C; T3 = 160°C and T4 = 180°C) and nine replications. The loss of mass caused by the fungus was less in heat treated wood. On the other hand, the increase in temperature did not provide greater resistance to the material. In conclusion, heat treatment has reduced the degradation caused by the white rot fungus Trametes versicolor. Heat treatment at 140°C is indicated to avoid loss of mass in P. taeda L. woods submitted to the fungus T. versicolor. All treated woods were classified as highly resistant.

Nursery Costs and Benefits of Container-Grown Southern Pine Seedlings

1982 ◽  
Vol 6 (2) ◽  
pp. 93-99 ◽  
Author(s):  
Richard W. Guldin
Keyword(s):  
Pinus Taeda ◽  
Slash Pine ◽  
Costs And Benefits ◽  
Southern Pine ◽  
Pine Seedlings ◽  
Present Worth ◽  
Bare Root ◽  
Pinus Taeda L ◽  
Time Required

Abstract Loblolly (Pinus taeda L.) and slash pine (P. elliottii Engelm.) seedlings can be grown in Number 2 Styroblock containers in timber-truss greenhouses for essentially the same cost per thousand as bare-root seedlings, if construction of a new nursery is contemplated. Because of the time required to expand a bare-root nursery, every additional dollar spent to expand output using a container facility at the existing location is rewarded with $5.90 in present-worth benefits.

Heat treatment effect on the physical properties of cobalt doped TiO2 sol–gel materials

2013 ◽  
Vol 85 ◽  
pp. 1-12 ◽  
Author(s):  
L. Samet ◽  
J. Ben Nasseur ◽  
R. Chtourou ◽  
K. March ◽  
O. Stephan
Keyword(s):  
Heat Treatment ◽  
Physical Properties ◽  
Treatment Effect ◽  
Sol Gel ◽  
Doped Tio2 ◽  
Tio2 Sol

scholarly journals A Comparison of WholeTree and Chipped Pine Log Substrate Components in the Production of Greenhouse Grown Annuals

2010 ◽  
Vol 28 (3) ◽  
pp. 173-178
Author(s):  
Whitney G. Gaches ◽  
Glenn B. Fain ◽  
Donald J. Eakes ◽  
Charles H. Gilliam ◽  
Jeff L. Sibley
Keyword(s):  
Physical Properties ◽  
Bulk Density ◽  
Pinus Taeda ◽  
Catharanthus Roseus ◽  
Total Porosity ◽  
Dry Weight ◽  
Air Space ◽  
Pine Trees ◽  
Impatiens Walleriana ◽  
Pinus Taeda L

Abstract WholeTree (WT) and chipped pine logs (CPL) are potential new sustainable greenhouse substrate components made by milling chipped pine trees and/or pine logs (Pinus taeda L.). Two experiments were conducted to evaluate the growth of Catharanthus roseus L. ‘Grape Cooler’ and Impatiens walleriana Hook.f. ‘Dazzler Apricot’ in 1:1 (v:v) WT:peat (WTP) and 1:1 (v:v) CPL:peat (CPLP), and to compare physical properties of those substrates. In Experiment 1 WTP had 76.8% container capacity (CC) and 96.4% total porosity (TP) while CPLP had 72.4% CC and 90% TP; air space (AS) and bulk density (BD) were similar. In Experiment 2 there were no differences in physical properties. In Experiment 1 EC peaked at 14 days after potting (DAP) and decreased through the remainder of the study. At 0 DAP pH ranged from 4.2–4.3 and increased to a range of 6.4 to 6.8 at 42 DAP. This trend was similar in Experiment 2, except that EC peaked at 7 DAP. In impatiens, plants were similar in Experiment 1 but those grown in WTP in Experiment 2 had bloom counts of 37.3 compared to 27.9 for plants grown in CPLP. With vinca, in Experiment 1 plants grown in CPLP had a dry weight of 7.3 g as compared to 6.9 g for plants grown in WTP, but there were no differences in Experiment 2. Results indicate that growers could use CPL and/or WT interchangeably, depending on available resources.

Growth and Fusiform Rust Responses of Piedmont Loblolly Pine After Several Site Preparation and Regeneration Methods

1990 ◽  
Vol 14 (1) ◽  
pp. 18-24
Author(s):  
W. Henry McNab ◽  
Thomas Miller ◽  
Ernst V. Brender
Keyword(s):  
Physical Properties ◽  
Pinus Taeda ◽  
Loblolly Pine ◽  
Prescribed Burning ◽  
Soil Physical Properties ◽  
Site Preparation ◽  
Direct Seeding ◽  
Fusiform Rust ◽  
Direct Seeded ◽  
Pinus Taeda L

Abstract Cutover pine-hardwood sites in the Piedmont of central Georgia were prepared by prescribed burning or drum chopping and regenerated to loblolly pine (Pinus taeda L.) by planting or direct-seeding. Site preparation had little effect on soil physical properties. After an average of 12 years, trees were larger in dbh and total height, the merchantable stand was greater, and distribution was more uniform on planted than on seeded areas. Regeneration from direct-seeding was enhanced more by intensive site preparation than was regeneration from planting. Neither fusiform rust incidence nor rust associated mortality was affected consistently by the intensity of site preparation, but both rust incidence and rust associated mortality were generally higher in the direct-seeded than in the planted plots. South. J. Appl. For. 14(1):18-24.

Loblolly Pine Stocking Levels affect Potential for Southern Pine Beetle Infestation

1980 ◽  
Vol 4 (4) ◽  
pp. 162-165 ◽  
Author(s):  
Peter L. Lorio
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Tree Growth ◽  
Dendroctonus Frontalis ◽  
Southern Pine Beetle ◽  
National Forest ◽  
Southern Pine ◽  
Management Objectives ◽  
Pine Beetle ◽  
Pinus Taeda L

Abstract By comparison with any o several stocking standards, loblolly pine (Pinus taeda L.) stands infested with southern pine beetle (Dendroctonus frontalis Zimm.) on the Kisatchie National Forest, Louisiana, were frequently overstocked. Stocking levels associated with reduced stand and tree growth and frequent intermittent water deficits also enhance successful southern pine beetle attack. Charts that help determine how well existing stocking meets management objectives are also useful for judging stand vulnerability to the southern pine beetle.

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